protected override void OnStop() { LogHelper.WriteWithMethod($"State:OnStop"); try { tcpListenerServer.NotifyDataEvent -= TcpListenerServer_NotifyDataEvent;; tcpListenerServer.Dispose(); tcpListenerServer = null; ledCom.CleanFormatedContentText(); ledCom.UnInitializeSCL(); ledCom = null; } catch (Exception ex) { LogHelper.WriteException(ex); } base.OnStop(); }